No, it wouldn't... Maconverter never tried to convert any pictures, simply because this is something that other utilities handle much more professional - especially GraphicConverter. However, if I ever get around to do Maconverter 2, it will probably contain some "Un-ProPrack" features like this... :-) GraphicConverter can actually edit Poser thumbnails, just set the input file selector to "PICT from Resource", and it lets you open any library file. You can edit it any way you like, including the alpha channel (it is used as a mask for the ".rsr" based thumbnails as well). If you finally select "Save" it will be saved back directly into the library file. Unfortunately, you can't create a new Poser thumbnail this way, so the only workaround would be to - paste in a generic thumbnail with ResEdit - open it in GraphicConverter - replace it with the .png content - save it back Not much good for batch conversions, I guess...